or‧tho‧don‧tics /ˌɔːθəˈdɒntɪks $ ˌɔːrθəˈdɑːn-/
noun [uncountable][
Date: 1900-2000;
Origin: ortho- 'straight' (from Greek; ⇒ orthodox) + Greek odous 'tooth']
the skill or job of helping teeth to grow straight when they have not been growing correctly
—orthodontic adjective:
orthodontic treatment [TahlilGaran] Dictionary of Contemporary English ▲